Apparently it is installed by default. I looked a 18.3 Cinnamon and 18.3 XFCE, and it is there in both of them. It is also in 17.3 XFCE. No idea whether it can be removed or not, but when you go to remove a package, it should tell you what else the remove will do.

“If the government were coming for your TVs and cars, then you'd be upset. But, as it is, they're only coming for your sons.” - Daniel Berrigan